Answer:
The income effect and the substitution effect of a wage rate change work in opposite directions.
Step-by-step explanation:
The substitution effect refers to the change in consumption patterns as a result of change in relative income and prices of goods. For example, Coca-Cola vs Pepsi, chicken vs beef etc.
The income effect refers to the change in consumption patterns as a result of change in the purchasing power of an individual. For example, a decrease in all product's prices means you can buy a cheaper product for the same price.
Thus, the only correct statement is that the income effect and the substitution effect of a wage rate change work in opposite directions.